What causes extra line

Question

Can anyone explain why I get an extra line in the results of the following sql
select 'test1'||chr(10)||'test1' from dual
union select 'test2'||chr(10)|| 'test2' from dual
results:
_'TEST1'||CHR(10)||'TEST1'_
test1
test1
                 *<--- where does this blank line come from?*
test2
test2
expected results:
_'TEST1'||CHR(10)||'TEST1'_
test1
test1
test2
test2
is there anyway to get rid of blank line?
Thanks
Wayne

Answer 1

Hmmm...not sure. I think SQL Plus is doing it. Possibly because it doesn't know you've added a "built in" carriage return.
Doing this from within pl/sql gives the expected results:
SQL> begin
  2     for c in (select       'test1'||chr(10)|| 'test1' x from dual
  3               union select 'test2'||chr(10)|| 'test2' x from dual) loop
  4     dbms_output.put_line(c.x);
  5     end loop;
  6  end;
  7  /
test1
test1
test2
test2
PL/SQL procedure successfully completed.(yep, Odie63 has the right answer)
Edited by: SomeoneElse on Jul 19, 2010 1:17 PM